Broiler.



H. P. BALL.

BROILER.

APPLICATION FILED JULYII. 1913 1,1 8 1 ,722. Patented May 2, 1910.

3 SHEETS-SHEET 1.

Inventor: Henry Pnce Ball wltnessesz His fitter-hes H. P. BALL.

BROILER.

APPLlCATION FILED JULYII. 1913.

Patented May 2, 1916.

3 SHEETSSHEET 2.

IIHHIIIIIIHIIIII' Inventor-z Henry Price Ball mm H is ttorneg Witnesses H. P. BALL:

BROILER.

APPLHIATION FILED JULY 11. 1913.

1,181,722. Patented May2,1916.

3 SHEETS-SHEET 3- lnv erwtor: t-lentyprl'ce Ball by MW Witnesses His afttorney 1 UNITED STATES PATENT OFFICE.

HENRY PRICE BALL, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A. CORPORATION OF NEW YORK.

BROILER.

Specification of Letters Patent.

Patented May 2,1916.

Application filed July 11, 1913. Serial N 0. 778,547.

features of my invention might be used in connection with ovens for various purposes.

Ovens of the typ'e to which my invention relates are usually constructed of walls having high" heat insulating properties and owing to the intense heat given off by the electric unit it is found necessary to carry on the cooking operation with the oven door partially or wholly open. In fact, if the door were closed while the current was turned on, the heat would become so ihtense as to not only burn any article which might be cooking but to probably do material damage to the oven itself. In order to guard against this contingency it has been proposed to so arrange the switch controlling the supply of electric energy to the heating unit that it could only be closed when the door was at least partially open and so that it would be automatically opened if the door were closed while the switch was closed.

One of the objects of my inv ntion is to provide a novel arrangement 0 parts for accomplishin the above described purpose.

Another object is to provide an oven wherein the support for the article to be heated can be adjusted toward and away from the heating unit.

Further objects of my invention will appear from and be pointed out in the course of this specification, wherein I have illustrated and described a structure embodying the various features of novelty and combination of parts which comprise my invention.

Referring to the drawing, Figure 1 is a front view of my oven; Fig. 2 is a fragmentary side view thereof; Fig. 3 is a longitudinal section; Fig. 4 is a detail perspective view of a switch; Fig. 5 is a perspective view of the adjustable support and its carrying frame, the parts being shown removed from the oven. Fig. 6 is a detail sectional view through the support and its carrying frame.

The oven 1 is shown as comprising a double walled receptacle having suitable heat insulating material 2 between the walls as is usual in this class of device. The door 7 3 is suitably hinged at the lower portion as shown at 4 and 5 to open downwardly and at its top carries a pivoted latch 6 which cooperates with the catch 7 fastened above the top of the doorway.

8 is a handle used for releasing the latch 6. The door is hinged at the bottom so that the operator while holding the door partially open can readily see how the cooking operation is proceeding.

Fixed to the back of the ovenand preferably near the top thereof is a channel shaped support 9 within which sets the horizontal projection or projections 10 carried by the heating unit 11. This heating unit is here illustrated as being an ordinary resistance wire carried in an inverted flanged casing adapted to reflect the heat downward and supported at the front by releasable catches 12, only one of which shows in the drawing.

By releasing these catches the heating unit is quickly and easily removed for repair or for cleaning.

Although I have illustrated an electrical heating unit of specific form it is to be understood that my invention is not limited to this type of heating unit but that I may use other types if desired,

Mounted within the hood 13 at the back of the oven is the means for controlling the supply of energy to the heating unit which in this instance is a snap switch 11 connected by leads 15 to the heating unit. [This switch is operated by means of a bell crank lever 16 pivoted above the doorway and ad- I jacent to handle 8 as best shown in Fig. 1.

One arm of the'bell crank lever carries a handle 17 while the other arm is connected to switch 14 by means of rod 18. Carried by the lever 16 is a projection 19 which takes behinda nose 20 on the upper portion of the door. With the door closed as shown in Fig. 3 the switch is open and the bell crank lever 16 cannot be operated to close the same unless the door is first lowered to move nose 20 away from projection 19.

switch will be operated through the engagement of nose 20 with the projection 19. The

object of this arrangement as before stated door is closed. By arranging the handles for the doorand switch adjacent each other as shown, the same are convenient for operation, it being possible to control the switch with the same hand which is being used to hold the door.

The specific form of snap switch which I have illustrated is shown in Figs. 3 and 4 as comprising two pairs of projecting standards 21 and 22 supported on base plate 23 and carrying switch blades 24 and 25. A rod 26 carrying spring pressed pawl 27 rigidly connects the switch blades 24 and 25, the rod 26 being insulated from the switch blades as shown. 28 is a drum journaled on supports 29 projecting from the base plate 23 and'having upon each side thereof the flanges 30 and 31. The flange 31 is shown as having a projecting car 32 to which operating rod 18 is connected and as also carrying two cam surfaces 33 and 34 which c0- operate with a lug 35 projecting from pawl 2 The pawl 27 carries also a lug 36 which engages upon one side or the other of a projection 37 on the end of the adjacent support 29, the pawl being biased by its spring for such engagement. Wound on the drum 28 is a'spring 38 the two ends of which project upon opposite sides of a rod 39 connected to the two flanges 30 and 31 and of rod 26.

The operation of the switch is as follows: With the switch closed the parts would occupy the positions shown in Fig. 4. If now connecting rod 18 is forced to the left the drum will be turned carrying with it rod-39. The switch blades are prevented from moving by reason of pawl 27 engaging under projection 37 and as a consequence spring38 will be put under tension, one end thereof being moved by rod 39 and the other end being held by rod 26. After a limited niovenient cam 34 will force'pawl 27 from engagement with projection 37 and the blades 24 and 25 being now released the spring 38 will quickly snap them to open position as shown in Fig. 3. To close the switch the action will be the same only in a reverse direction the cam 33 coming into play.

Referring nowparticularly to Fig. 5 the support for the article to be heated is shown at 40 as comprising a rectangular frame provided with longitudinal stri s 41 and guide rails 42, one on each side. hese guide rails slide in the U-shaped channel bars 43 and 44, which in connection with other parts to be described, form my supporting frame. 45 and 46 are two supporting strips extending longitudinally of the oven and attached to the sides thereof by bolts or rivets 47. These supporting strips areeach provided with a slot 48 at the front end and terminate in a hook 49 at-the rear. 50 and 51 are two rods extending crosswise of the oven and adapted to slide upon the strips 45 and 46 and to engage and be held in place by the hooks 49 and slots 48. Attached adjacent the ends of each of these rods 50 and 51 are bell crank levers 52 to the downwardly projecting arm of which are pivoted the longitudinal strips 53. Each horizontal arm of of the channel bars 43and 44 andthe cross bracket coiiperating with guiding bracket 57 to limit the rearward movement, (see Fig. 3). Carried by cross bracket 59 are two stops 61 which coiiperate with pivoted catches 62 to limit the forward movement of support 40. By moving these catches to the position shown in Fig. 5 it will be seen that the support can be entirely removed from its carrying frame. Extending through an opening in the side. of the oven is a short shaft 63 adapted to engage with the end of rod 50. This shaft 63 carries an operating handle 64 as shown in Figs. 1 and 2, the handle having a pivoted latch 65 coiiperating with toothed segment 66 to hold or lock the same in any desired position. By moving handle 64 forward and backward rod 50 will be oscillated to raise and lower support 40 as will be readily understood from Fig. 5. By this means the support can be adjusted with relation to the heating unit as desired.

advantage in that it protects the unit fromany drippings from articles being cooked or any materials which might be spilled. By arranging the support as shown it can readily be pulled partially through the oven door for turning or removing articles that are cooking. 7

What I claim as new and desire to secure by Letters Patent of the United States, is 1. The combination of a stationary oven, a heating unit, a, frame adjustable toward and away from said heating unit mounted in said oven and a support slidably engaging with-said frame. i 2. The combination of an oven, a heating unit, a shaft and a frame in said'oven, operative connections between said shaft and frame whereby oscillations of said shaft will adjust the relation of the frame to the heating unit and a support slidably engaging and carried by said frame.

3. The combination of an oven, a heating unit, a shaft and a frame in said oven, operative connections between said shaft and frame whereby oscillations of said shaft will adjust the relation of the frame to the heating unit, a support slidably engaging and carried by said frame and means for limiting the sliding movement of the support.

4. In combination, an oven having an opening, a heating unit mounted in the oven, a frame mounted below said heating unit, a support carried by said frame and slidable through the opening and means for limiting the sliding movement of the support.

In witness whereof, I have hereunto set my hand this 2nd day of July, 1913.

HENRY PRICE BALL.

Witnesses:

H. B. DAVERIN, M. J. REYNOLDS. 

